Building-slab.



E. JENSEN.

BUILDING SLAB. APPLICATION FILED MAR. 4. |918.

1,296,525. 'Patented Mar. 4,1919.

EMANUEL IEN-SEN, OF FREDERIKSBERG, NEAR COPENHAG-EN, DENMARK.

BUILDING-SLAB.

Specification of Letters Patent.

Patented Mar. 4, 1919.

Application filed March 4, 1918. Serial No. 220,28'3. i'

To all whom t may concern.'

'Be it known that I, EMANUEL JENSEN, manufacturer, subject of the King of Denmark, residing at Frederiksberg, near C openhagen, Denmark, have invented certain new and useful Improvements in Building- Slabs, of which the following is a specification.v Y

The present invention relates to a building. material in shape of plates 0r slabs, con-- ,sisting of wooden laths, tied together and able space is lett between any two laths.'

This interstice is filled, at ,once or later, by a hardening mortar or a plastery mass which may either fill the interstices alone or also cover the wooden laths. In the f ormer case, V' the slabs should receive a finishing coat of plaster after they have been fitted in place, in the latter case they may be finished entirely with a plaster coat in the factory. On

the laths there may be cemented a layer of,

paper or felt-paper. Forinsideuse it may be common paper cemented on the slab by means of a fireproof adhesive, for instance a compound of water-glass and asbestos, while for outside use it consists of paperor feltpaper impregnated with bitumen and also cemented to the laths by means of bitumen. The outer face of the felt-paper receives a coating of sand, cork chips or a similar granular material, maintained in position by means of the same kind of adhesive as used for the felt-paper and serving to retain a coat of plaster applied, eventually, on the paper.

When the slabs are .used as roofing plates, the said paper 0r feltA is used to make watertight joints by allowingthe felt toprogect -somewhat beyond the slab on either side, and' the joint is then 'made as indicated in Figs. 4 and 5.

In order to facilitate. the comprehension of example, how it' may be carried into effect.

Figure 1 shows a cross-section of the buildo`r this invention, it has been illustrated in ing slab as it looks, before it has been filled out with mortar,

Fig. 2 shows a. cross-section of the slab, after it has been lled out with mortar.

Fig. 3 shows a cross-section of the slab with a layer of paper or felt cemented thereto.

Referring to the drawing, l indicates the woodenlaths, 2 thewires, 3 the grooves in the face of the laths, 4 the chamfering, 5 the mortar and 6 the paper coating. As shown in Fig. 3 the paper coating 6 is roughened by the addition of sand, cork-chips or the like.A

The mortar 5 is held to 'the slab partly by penetrating down ,in the grooves 3 and, partly, by fitting around the chamferings 4C. Besides serving the purpose of keeping the mortar in place, the groove in the lath is useful in decreasing the tendency of the lath to warp.

When the slabs are delivered from the factory complete with plaster coating, they are have been placed in the building, then the` slabs maybe shipped in coiled state, which makes the transportation more easy.

The advantage of these slabs is that they are easier to produce, as they are manufactured by machine, and the material does not cost much, as any waste-wood may be used for this, even waste-pieces from slender spruce trees which may be cut into laths of the shape shown on the drawing without much work and, besides, it is' not important that the chamferings of the edges onfall the laths ,should be alike. are c hamfered onthe lower side of the lat s, the better will they retain the mortar coating. In fact, laths may be used having only The more the .ed S i sa cheap material as, for instance, a mixture 'of clay and chaff, peat dust or thelike, or a lean slag concrete. As plates for outside use are fitted with aY covering ofpaper or felt impregnated with bitumen, no dampness will be able to reach the wooden laths or the mortar coat and, as the paper is covered with out, the use of expenSive materials, a cheap,

durable and ireproof slab, suitable for in door and outdoor covering of wooden posts, for roof covering, insulation' of damp walls, ete., and one which is of a shape and lightness enabling it to be shipped over long distances.

Having now particularly described the nature of my said invention, and in what manner the, same is tobe Car1'ie .lout,l claim:

A building slab or lathing material (foinprising a plurality of wooden laths having means lbinding them together in spaced relation, each of-"said lathsl having a fiat 4surface on one of its sides extending the width thereof, and provided with a groove, and a. plastu filling material covering the laths and occupying the spaces therebetween, said 'filling material being anrh'ored to the laths by thel binding means and lSaid grooves, and a aeeond covering of material overlying one side ot' the slab, said material presenting a Toughened suri'are whereby a eoat of finishing material may be applied thereto.

Iny testimony whereof the rt'ore 'oing speriiiration is signed in the presence of two witnes-ses. i

EMAN IGI; JENSEN'. Witnesses:

Ji'mrs LEHMANN, (hunl lli-:MMixesiir: 

